JPS59636Y2 - mobile watch side - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a portable watch having a back lid which is engaged and fixed with a piellonet.

Conventionally, the means for fixing the back cover to the body include screws and biting.

However, the former requires a large number of screw threads to prevent it from coming off, and as a result, a large number of threaded parts are required on the body, which has a large effect on the thickness of the watch.Furthermore, the rotating screw-type back lid of the battery and watch is fixed. It is not possible to provide a battery inlet on the back cover.

This is because the battery inlet must always be in a fixed position.

In addition, in the latter case, the body side cross-sectional view diameter needs to be large due to the need to provide biting strength, which has the disadvantage of making the outer diameter of the case too large. It is necessary to form many steps in the
There are drawbacks such as the appearance of the case and back cover is significantly damaged, and the case feels thick.

This invention was devised with the intention of eliminating the above-mentioned drawbacks, and the back cover is secured and fixed by a piellonet, which reduces the thickness of the body, downsizes the back cover, and stabilizes assembly and disassembly. The purpose is to

Hereinafter, the present invention will be explained in detail with reference to the drawings showing one embodiment.

FIG. 1 shows a partial sectional view of the body and the back cover, and in this figure, 1 indicates the body and 2 indicates the back cover.

On the outer end of the inner surface of the back cover 2, there is a protrusion 2 along the outer periphery.
a is formed.

A waterproof gasket 3 is fixed on the outside of this protrusion 2a, and on the inside of the protrusion 2a there is a so-called Z-shaped bio-screw in which both ends are newly bent into an L-shape.One end of the IJ ring 4 is brazed, etc. is fixed in one piece.

Therefore, the back lid 2 closes the body 1 via the waterproof gasket 3. At this time, the waterproof gasket 3
It is compressed by the cross-sectional mold part created by this and the mold cut part formed at the lower opening edge of the body 1.

On the other hand, the tip claw portion 4a of the bayonet ring 4 enters the bayonet engagement groove 1a formed in the inner wall of the barrel 1.

As is well known, the piellonet structure is engaged by rotating the piellonet ring by a predetermined angle. A guide portion 1b is formed so that the portion 4a can enter the pipe thread groove 1a (see FIG. 2).

A parallel surface 4b parallel to the timepiece movement 5 is formed on the end surface of the piellonet ring 4 fixed to the back cover 2, and constitutes a surface for pushing up the inner frame 6.

Furthermore, the parallel surface 4b has the following role.

In other words, the slope 2b formed on the outer surface of the back cover has the role of a receiving surface when making a slope stamping hole (not shown), and it is accurate and beautiful, and also has a stable shape to prolong the life of the stamping die. This serves as a receiving surface 4a.

FIG. 2 shows an embodiment of the rotation prevention of the pipe screw locking back cover 2. As shown in FIG.

Normally, the end of the pionet locking groove 1a formed in the barrel or a separately formed anti-rotation piece is used, but in this embodiment, a winding stem pipe or button pipe 7 is used to prevent rotation. .

In this case, there is an advantage that the pionet locking groove 1a can be formed by a simple operation of forming the pionet locking groove 1a all around the inside of the shell.

Further, FIG. 3 shows an example in which a battery cover 8 is further provided on the back cover 2 using a piellonet locking structure.

In Japan, 9 indicates the glass edge, 10 indicates the glass, and 11 indicates the dial holder ring.

In the above configuration, according to the present invention, the back cover is engaged and fixed to the body by the piellonet, so there is no need for an extra thickness or diameter of the body, and the back cover is fixed by the piellonet. Since the whole pig is suspended by the packing 3, the packing instantly absorbs the impact from the side and the direction of the pig, making it shock resistant. Since it is made of a thin plate with spring properties, it has the effect of absorbing shocks in the vertical direction, and even if it receives external pressure such as water pressure, the back cover is not completely fixed unlike screws, etc., so it can absorb pressure. As the amount increases, the tightening margin of the seal 3 increases, which has the advantage of significantly improving waterproofness.

Furthermore, since the inner frame can be pushed up with the piellonet ring 4, even if the battery E is installed on the outer periphery of the movement, the battery cover can be formed by simply machining the inner surface. By incorporating,
Disassembly is easy, the back cover can be reliably assembled, and special skills are not required for assembly and disassembly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention, FIG. 2 is a plan view of the main part, and FIG. 3 is a sectional view showing another embodiment. 1... Trunk, 2... Back cover, 3... Patchkin, 4...
・・Pionet ring, 6・Inner frame, 7・Pipe, 8・Battery cover.

Claims (4)

[Scope of utility model registration request] (1) A bayonet in which a Z-shaped bayonet ring with a partial cross section is integrally provided inside the back lid, and a bayonet engaging groove and a rotation stopper for the bayonet ring are provided on the side of the body facing the bayonet ring. A portable watch side characterized in that it has a net back cover engagement structure, and one inner end of the piellonet ring has a flat end surface for pushing up and holding a watch movement or an inner frame. (2) The portable watch side according to claim 1, wherein the flat end surface of the piellonet ring serves as a receiving surface for a stamp made on a part of the outer slope of the back cover. (3) The portable watch side according to claim 1, wherein the rotation stopper of the piellonet ring is a winding stem pipe that projects into the piellonet retaining groove on the side surface of the body. (4) The portable watch according to claim 1, wherein the battery cover is further engaged and fixed by the piellonet on the back cover which is engaged with the piellonet.